Integral heavy duty door knob



Sept. 27, 1966 w. B. WILSON 3,275,365

INTEGRAL HEAVY DUTY DOOR KNOB Original Filed Nov. 20, 1962 IrivenTor: lDiHiam B. UiIson 5 %zmu United States Patent 3,275,365 INTEGRAL HEAVY DUTY DOOR KNOB William B. Wilson, Corona, Calif., assignor to Robert H.

This is a division of application Serial No. 238,973, filed November 20, 1962, now Patent No. 3,200,630, issued August 17, 1965.

The present invention relates to the production of one piece heavy duty door knobs for builders locks or lock sets, and in which the knob and its integral inner tubular part are extruded of a slug of brass, stainless steel or other suitable metal in a high energy metal working or extrusion press to provide a cupped member having concentric tubular parts the outer of which forms the knob and the inwardly spaced tubular part integrally formed with the end wall or face of the knob.

It is .an important object of the present invention to provide a novel heavy duty door knob and integral tube assembly comprising concentric tubular parts the outer tubular part of which is formed to provide a cupped member or knob and the inner tubular part operational by providing its inner or extended end with a roll-back for retracting the latch bolt of a lock assembly.

The present invention further comprehends a novel one-piece knob and tube assembly, the latter including an integral tubular part having an arcuate extension projecting from the inner end with its spaced edges providing a roll-back to actuate a latch bolt of a lock assembly upon turning of the knob.

In this novel assembly the inner tubular part is longitud-inally slotted for receiving a key lock assembly or other operational part, and the outer tubular part has its free end rolled in or contoured to the desired shape.

Further objects are to provide a construction of maximum simplicity, etiiciency, economy and ease of assembly and operation, and such further objects, advantages and capabilities as will later more fully appear and are inherently possessed thereby.

In the drawing:

FIG. 1 is a vertical cross-sectional view of an integral knob and tube assembly formed by impact but with the integral inner tube formed with a roll back to make it operational, the View being taken on the line 11 of FIG. 2.

FIG. 2 is a view in end elevation of the integral knob and tube assembly of FIG. 1, the view being taken from the inner end thereof but with a portion of the inner end of the knob broken away.

Referring to the disclosure in the drawing and to the novel illustrative embodiment therein shown, the present invention comprehends a novel heavy duty knob unit formed by impacting a slug or billet of metal, such as brass or stainless steel, to form a one-piece knob unit consisting of an outer tubular part 11 forming the knob and its integral inner tubular part 12 projecting rearwardly through the knob from its end wall 13. Unlike prior means and methods of producing heavy duty knobs requiring the assembly and attachment of preformed plural parts, after which the outer and inner shells are rolled together to maintain tight frictional engagement,

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the present invention comprehends extruding a cupped member having concentric tubular parts -in a high energy press to form an integral knob and tube unit.

In the novel disclosed embodiment, the knob unit with its integral inner and outer tubular parts is formed by impact in a high energy extrusion press with the integral inner tubular part 12 provided at its inner end with an arcuate extension or projection 14 having spaced longitudinally extending ribs 15. The arcuate projection 14 with its ribs 15 forms a roll back for actuating a latch bolt by turning of the knob.

In FIG. 1 is shown the inner end 16 of the outer tubular part 11 which forms the resulting knob of the integral knob and tube assembly rolled inwardly at 18 from its impacted or extruded cylindrical form as shovm in the lower portion, the inner tubular part 12 being provided with a longitudinal slot 19 for a key lock assembly and whatever other side operations are required for mounting the finished integral knob and tube assembly to the projected end of a tubular cam member or spindle of a lock assembly in a door.

It will be appreciated that the simplified construction of knob and its inner tubular part for-med integral in this novel manner not only eliminates the necessity for the plural parts previously required but also the numerous steps in forming and uniting of plural parts in producing prior knobs capable of heavy duty use, thus aifecting a substantial saving in material, time and labor.

Having thus disclosed the invention, I claim:

1. An integral heavy duty door knob and internal tube assembly to provide an end wall and concentric tubular parts projecting rearwardly from the end wall, the outer tubular part being cylindrical adjacent the end wall and curving inwardly toward its inner end to provide a knob, and the inner tubular part providing an internal tube projecting rearwardly through and beyond the inner end of the knob, said inner tubular part having .a longitudinal slot therein and provided at its inner end with an arcuate projection of the inner tubular part having spaced longitudinal edges providing a roll back for retracting a latch bolt.

2. An integral heavy duty door knob and internal tube asssernbly as set forth in claim 1, in which each of said longitudinal edges has a longitudinally extending r-ib on the exterior surface of the arcuate projection.

3. An integral heavy duty door knob and internal tube assembly as set forth in claim 1, in which said end wall has a concave external surface terminating at an annular convex head.

4. An integral heavy duty door knob and internal tube assembly as set forth in claim 1, in which said arcuate projection is an extension of a portion of the inner tubular part and positioned diametrically opposite the longitudinal slot.

References Cited by the Examiner UNITED STATES PATENTS 1,674,841 6/ 1928 Schlage. 2,273,190 2/ 1942 Harrison 292347 X 2,677,953 5/1954 Fisler et al. 224 3,066,523 12/1962 Crepinsek 292'l69 X EDWARD C. ALLEN, Primary Examiner.

RICHARD E. MOORE, Assistant Examiner. 

1. AN INTEGRAL HEAVY DUCT DOOR KNOB AND INTERNAL TUBE ASSEMBLY TO PROVIDE AN END WALL AND CONCENTRIC TUBULAR PARTS PROJECTING REARWARDLY FROM THE END WALL, THE OUTER TUBULAR PART BEING CYLINDRICAL ADJACENT THE END WALL AND CURVING INWARDLY TOWARD ITS INNER END TO PROVIDE A KNOB, AND THE INNER TUBULAR PART PROVIDING AN INTERNAL TUBE PROJECTING REARWARDLY THROUGH AND BEYOND THE INNER END OF THE KNOB, SAID INNER TUBULAR PART HAVING A LONGITUDINAL SLOT THEREIN AND PROVIDED AT ITS INNER END WITH AN ARCUATE PROJECTING OF THE INNER TUBULAR PART HAVING SPACED LONGITUDINAL EDGES PROVIDED A ROLL BACK FOR RETRACTING A LATCH BOLT. 